1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/ascii.h>
#include <dev/video/fbdev.h>
#include <dev/cons/font.h>
#include <dev/cons/cons.h>
#include <string.h>
struct cons_screen g_root_scr = {0};
/*
* Render a character onto the screen.
*
* @scr: Screen to render to.
* @c: Char to render.
* @x: X position of char.
* @y: Y position of char.
*/
static void
cons_render_char(struct cons_screen *scr, char c, uint32_t x, uint32_t y)
{
size_t idx;
const uint8_t *glyph;
glyph = &CONS_FONT[(int)c*16];
for (uint32_t cy = 0; cy < FONT_HEIGHT; ++cy) {
for (uint32_t cx = 0; cx < FONT_WIDTH; ++cx) {
idx = fbdev_get_index(&scr->fbdev, x+FONT_WIDTH-cx, y+cy);
scr->fb_mem[idx] = ISSET(glyph[cy], BIT(cx)) ? scr->fg : scr->bg;
}
}
}
/*
* Clear the screen.
*
* @scr: Screen to clear.
* @bg: Color to clear it to.
*/
static void
cons_clear_scr(struct cons_screen *scr, uint32_t bg)
{
struct fbdev fbdev = scr->fbdev;
for (size_t i = 0; i < fbdev.height * fbdev.pitch; ++i) {
scr->fb_mem[i] = bg;
}
}
/*
* Handle a special character (e.g "\t", "\n", etc)
*
* @scr: Screen to handle this on.
* @c: Char to handle.
*
* Returns 0 if handled, otherwise -1.
*/
static int
cons_handle_special(struct cons_screen *scr, char c)
{
switch (c) {
case ASCII_LF:
/* Make a newline */
scr->ch_col = 0;
++scr->ch_row;
return 0;
}
return -1;
}
/*
* Put a character on the screen.
*
* @scr: Screen.
* @c: Character to draw.
*/
int
cons_putch(struct cons_screen *scr, char c)
{
if (scr->ch_col > scr->ncols) {
/* Make a newline as we past the max col */
scr->ch_col = 0;
++scr->ch_row;
}
if (scr->ch_row > scr->nrows) {
/* Went over the screen size */
scr->ch_col = 0;
scr->ch_row = 0;
cons_clear_scr(scr, scr->bg);
}
/*
* If this is a special char that we can handle
* then handle it and return.
*/
if (cons_handle_special(scr, c) == 0) {
return 0;
}
cons_render_char(scr, c, scr->ch_col * FONT_WIDTH,
scr->ch_row * FONT_HEIGHT);
++scr->ch_col;
return 0;
}
void
cons_init(void)
{
struct fbdev fbdev = fbdev_get();
g_root_scr.fg = 0x00AA00;
g_root_scr.bg = 0x000000;
g_root_scr.fb_mem = fbdev.mem;
g_root_scr.nrows = fbdev.height / FONT_HEIGHT;
g_root_scr.ncols = fbdev.width / FONT_WIDTH;
g_root_scr.fbdev = fbdev;
}
|
